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PatchSiren cyber security CVE debrief

CVE-2025-13223 Google CVE debrief

CVE-2025-13223 is a Google Chromium V8 type confusion vulnerability that CISA added to the Known Exploited Vulnerabilities catalog on 2025-11-19. Because it is in KEV, defenders should treat it as urgent and follow vendor remediation guidance promptly, with the CISA due date set for 2025-12-10.

Vendor
Google
Product
Chromium V8
CVSS
HIGH 8.8
CISA KEV
Listed
Original CVE published
2025-11-19
Original CVE updated
2025-11-19
Advisory published
2025-11-19
Advisory updated
2025-11-19

Who should care

Security teams, endpoint administrators, browser fleet owners, and organizations that deploy Chromium-based browsers or products embedding Chromium V8 should prioritize this issue.

Technical summary

The affected component is Chromium V8, Google’s JavaScript/WebAssembly engine used in Chromium-based browsers. The supplied corpus identifies the issue as a type confusion vulnerability and records it as a CISA KEV item, but does not provide a CVSS score, exploit chain details, or impact specifics. The KEV listing is the key signal for defense prioritization.

Defensive priority

Immediate. CISA added this CVE to KEV on 2025-11-19 and set a remediation due date of 2025-12-10. Apply vendor mitigations or updates across Chromium-based browser fleets as soon as practical, starting with the most exposed and widely deployed systems.

Recommended defensive actions

  • Apply the vendor’s fixed Chromium/Chrome release or other Google-provided mitigation guidance as soon as it is available in your environment.
  • Inventory Chromium-based browsers and any products that embed Chromium V8 so you can confirm coverage across managed endpoints.
  • Prioritize patching on systems with broad user access, internet exposure, or higher operational risk.
  • If mitigations are unavailable, follow CISA guidance to restrict use or discontinue the product until remediation is possible.
  • Track the CISA KEV catalog and the vendor’s official release notes for follow-up guidance and any subsequent updates.

Evidence notes

Primary evidence comes from CISA’s Known Exploited Vulnerabilities catalog entry dated 2025-11-19, which names Google Chromium V8 Type Confusion Vulnerability and references Google’s stable-channel release notes and the NVD record. The supplied corpus does not include a CVSS score or detailed exploit impact statement.

Sources and references

Verified primary and authoritative sources

  • CVE-2025-13223 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2025-13223

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2025-13223 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2025-13223

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

  • CISA Known Exploited Vulnerabilities catalog

    Publisher, destination, and source semantics verified

    URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog

    Cybersecurity and Infrastructure Security Agency - Official CISA catalog of vulnerabilities known to be exploited in the wild.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

    cisa_kev

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.